JPS5432330B2 - - Google Patents
Info
- Publication number
- JPS5432330B2 JPS5432330B2 JP2258176A JP2258176A JPS5432330B2 JP S5432330 B2 JPS5432330 B2 JP S5432330B2 JP 2258176 A JP2258176 A JP 2258176A JP 2258176 A JP2258176 A JP 2258176A JP S5432330 B2 JPS5432330 B2 JP S5432330B2
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
- Microscoopes, Condenser (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/554,418 US3979160A (en) | 1975-03-03 | 1975-03-03 | Compact overhead projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51117030A JPS51117030A (en) | 1976-10-14 |
| JPS5432330B2 true JPS5432330B2 (it) | 1979-10-13 |
Family
ID=24213254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51022581A Granted JPS51117030A (en) | 1975-03-03 | 1976-03-02 | Compact projector |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3979160A (it) |
| JP (1) | JPS51117030A (it) |
| AU (1) | AU498228B2 (it) |
| CA (1) | CA1050312A (it) |
| DE (1) | DE2608957A1 (it) |
| FR (1) | FR2303308A1 (it) |
| GB (1) | GB1524444A (it) |
| IT (1) | IT1057284B (it) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4320439A (en) * | 1979-02-12 | 1982-03-16 | General Electric Company | Compact lamp unit and socket |
| DE3627740A1 (de) * | 1986-08-16 | 1988-02-18 | Demolux | Overhead-projektor |
| US4719547A (en) * | 1986-09-19 | 1988-01-12 | Minnesota Mining And Manufacturing Company | Illumination system for overhead projector |
| US5227821A (en) * | 1987-04-30 | 1993-07-13 | Nview Corporation | Liquid crystal display for projection systems |
| US5255029A (en) * | 1987-04-30 | 1993-10-19 | Nview Corporation | Liquid crystal display for projection systems |
| DE3728191C1 (de) * | 1987-08-24 | 1989-02-23 | Medium Vertriebsgesellschaft F | Durchlicht-Schreibprojektor |
| US4969733A (en) * | 1989-10-02 | 1990-11-13 | Dukane Corporation | Foldable portable overhead projector |
| JPH0760248B2 (ja) * | 1992-04-02 | 1995-06-28 | スライデックス株式会社 | 映像回転装置を有するオーバーヘッド映写機 |
| US5345371A (en) * | 1992-11-05 | 1994-09-06 | Cunningham David W | Lighting fixture |
| US5544029A (en) * | 1993-11-12 | 1996-08-06 | Cunningham; David W. | Lighting fixture for theater, television and architectural applications |
| US5416541A (en) * | 1994-05-16 | 1995-05-16 | Fog; Stephen C. | Folding portable overhead projector |
| US5504544A (en) * | 1994-11-23 | 1996-04-02 | Minnesota Mining And Manufacturing Company | Projector with multiple lamp light source |
| JP2007212576A (ja) * | 2006-02-07 | 2007-08-23 | Shinko Electric Ind Co Ltd | 光学装置 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126786A (en) * | 1964-03-31 | appeldorn | ||
| US2059033A (en) * | 1933-02-22 | 1936-10-27 | Rivier Louis | Cinematographic projector |
| US3176578A (en) * | 1959-11-20 | 1965-04-06 | Bolsey Emil | Optical projection device |
| US3711194A (en) * | 1965-10-24 | 1973-01-16 | H Wilson | Overhead projection apparatus |
| US3308715A (en) * | 1965-11-01 | 1967-03-14 | C S Ashcraft Mfg Co Inc | Projection system and equipment |
| US3428800A (en) * | 1965-12-10 | 1969-02-18 | Sylvania Electric Prod | Spotlight lamp |
| US3578966A (en) * | 1969-11-05 | 1971-05-18 | Sylvania Electric Prod | Vehicle driving light |
| GB1278690A (en) * | 1969-12-17 | 1972-06-21 | Thorn Lighting Ltd | Improvements relating to screen projectors |
| US3708221A (en) * | 1970-04-02 | 1973-01-02 | Anchor Hocking Corp | Aspheric lens and method of manufacture |
| GB1290438A (it) * | 1970-04-10 | 1972-09-27 | ||
| GB1280977A (en) * | 1970-04-15 | 1972-07-12 | Charles Frank Ltd | Optical projection device |
| US3763348A (en) * | 1972-01-05 | 1973-10-02 | Argus Eng Co | Apparatus and method for uniform illumination of a surface |
| US3806236A (en) * | 1972-02-28 | 1974-04-23 | Gen Electric | High intensity projection lamp assembly with heat shield |
-
1975
- 1975-03-03 US US05/554,418 patent/US3979160A/en not_active Expired - Lifetime
-
1976
- 1976-03-02 DE DE19762608957 patent/DE2608957A1/de active Granted
- 1976-03-02 CA CA246,891A patent/CA1050312A/en not_active Expired
- 1976-03-02 IT IT48372/76A patent/IT1057284B/it active
- 1976-03-02 FR FR7605821A patent/FR2303308A1/fr active Granted
- 1976-03-02 AU AU11575/76A patent/AU498228B2/en not_active Expired
- 1976-03-02 GB GB8332/76A patent/GB1524444A/en not_active Expired
- 1976-03-02 JP JP51022581A patent/JPS51117030A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT1057284B (it) | 1982-03-10 |
| GB1524444A (en) | 1978-09-13 |
| AU1157576A (en) | 1977-09-08 |
| DE2608957A1 (de) | 1976-09-16 |
| US3979160A (en) | 1976-09-07 |
| AU498228B2 (en) | 1979-02-22 |
| JPS51117030A (en) | 1976-10-14 |
| CA1050312A (en) | 1979-03-13 |
| DE2608957C2 (it) | 1987-07-02 |
| FR2303308A1 (fr) | 1976-10-01 |
| FR2303308B1 (it) | 1982-04-23 |